Aircraft Insulation Blanket Drainage for Humidity Control
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Solution Overview
Problem
Existing glass wool blankets in aircrafts suffer from water accumulation leading to increased weight and reduced thermal and acoustic insulation performance, necessitating frequent maintenance checks, which increases maintenance effort.
Innovation Solution
A thermal and acoustic insulation system with a core layer and a protective packing layer, equipped with humidity sensors and drainage openings, that dehumidifies on demand using self-powered sensors and actuatable drainage openings, minimizing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass wool blankets are used for thermal and acoustic insulation, then thermal and acoustic damping performance is improved, but water accumulation occurs leading to increased weight and reduced performance
Solution Approach 1:
The patent applies preliminary action by incorporating drainage openings and hydrophobic coatings into the insulation system before water accumulation becomes problematic. The drainage openings are pre-configured to enable water removal, and the hydrophobic coating is applied in advance to repel water, preventing the weight increase and performance degradation that would occur with water absorption.
Solution Approach 2:
The patent extracts the water management function from the insulation material itself by incorporating separate drainage openings and hydrophobic coating layers. This separates the insulation function (provided by the glass wool) from the water management function (provided by the drainage system and coating), allowing the insulation material to maintain its thermal and acoustic properties while water is removed through dedicated pathways.
2Reliability
If glass wool blankets are used for insulation, then thermal and acoustic comfort is improved, but frequent maintenance checks are required, increasing maintenance effort
Solution Approach 1:
The patent applies self-service by enabling the insulation system to monitor its own water accumulation status through integrated sensors that automatically trigger drainage operations. The system serves itself by detecting when water has accumulated and activating the drainage openings without requiring external intervention or manual inspection, thereby eliminating frequent maintenance checks while maintaining thermal and acoustic comfort.
Solution Approach 2:
The patent implements feedback by incorporating sensors that continuously monitor the insulation system's condition and provide information to control the drainage openings. This closed-loop feedback mechanism allows the system to automatically respond to water accumulation conditions, eliminating the need for manual maintenance checks and ensuring consistent performance throughout the aircraft's operational life.
3Object-affected harmful factors
If complete prevention of water ingress is attempted, then water accumulation is reduced, but installation complexity and material requirements increase
Solution Approach 1:
The patent applies local quality by implementing hydrophobic coating only in specific critical areas where water ingress is most likely to occur, rather than coating the entire insulation system. This targeted approach provides effective water repellency where needed while minimizing the additional material requirements and installation complexity that would result from comprehensive coating of the entire system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Maintains high thermal and acoustic comfort with minimal installation effort and on-demand maintenance, reducing weight gain and maintenance frequency by effectively managing water ingress.
Implementation Method 1
a core layer (4) having a thermal and acoustic damping performance
Implementation Method 2
materials having acoustic absorption properties, i.e., materials having the effect of reducing the intensity of sound waves by causing accelerated damping of said waves
Implementation Method 3
the packing layer protects the core layer from water ingress... it can also be advantageous to provide the packing layer and optionally also the core layer with a hydrophobic coating
Implementation Method 4
at least one sensor adapted to measure a level of humidity present in the insulation package and, especially, in the core layer
Implementation Method 5
The provision of such at least one sensor helps to deal with the problem of water ingress into the insulation package... supports maintenance on demand to drain the insulation package as required
Data Source
AI summary
A thermal and acoustic insulation system for an aircraft, to be received between an inner surface of an aircraft primary structure, such as an aircraft fuselage structure, and a surface of a panel arrangement delimiting an aircraft cabin, the surface facing away from the aircraft cabin, comprises an insulation package and at least one sensor adapted to measure a level of humidity present in the insulation package. The insulation package comprises a core layer having a thermal and acoustic damping performance, and a packing layer enclosing the core layer. The packing layer is provided with a plurality of normally closed and selectively openable drainage openings which are actuatable to change between their normally closed state and an open state.